R1: "Foam" must be translated as "foam"  The advertising engraving knife is not only a specialized tool for advertising production but also a versatile utility in daily life and handicrafts. With its sharp precision and smooth cutting, it can engrave, slot, and trim advertising materials such as acrylic, PVC, double-sided boards, and KT boards, enabling the creation of signage, logos, and 3D lettering. In daily use, it can cut adhesive labels, stickers, cardboard, and foam boards, making it ideal for DIY projects like scrapbooking, modeling, and rubber stamping. It can also shape plastic, leather, and thin boards, drill holes and trim edges for storage boxes and flower pots, handle packaging materials, and create small ornaments. Compact and flexible, it offers superior control compared to scissors or craft knives, being more precise and effortless. By appropriately selecting cutting heads at various angles, it can meet both professional processing needs and address diverse daily precision-cutting requirements, combining practicality with efficiency.